Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual o oponente na final que tem uma parceria com graydon oliver?
 ###Tabelas: CREATE TABLE all_players (all_players_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Highest singles ranking VARCHAR, Highest doubles ranking VARCHAR, First year played INT, Years played INT, Ties played INT, Total W–L VARCHAR, Singles W–L VARCHAR, Doubles W–L VARCHAR) CREATE TABLE runners-up_6 (runners-up_6_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partnering VARCHAR, Opponent in the final VARCHAR, Score VARCHAR) CREATE TABLE summary_table (summary_table_id AUTO_INCREMENT PRIMARY KEY, Interferon beta-1a VARCHAR, Betaseron (beta-1b) VARCHAR, Copaxone VARCHAR, Mitoxantrone VARCHAR, Tysabri VARCHAR, Fingolimod (Gylenya) VARCHAR, Teriflunomide VARCHAR) CREATE TABLE season_4_1997 (season_4_1997_id AUTO_INCREMENT PRIMARY KEY, No. in series VARCHAR, No. in season VARCHAR, Title VARCHAR, Directed by VARCHAR, Written by VARCHAR, Original air date VARCHAR, Production code VARCHAR) CREATE TABLE america_rock (america_rock_id AUTO_INCREMENT PRIMARY KEY, Episode title VARCHAR, Subject VARCHAR, Music by VARCHAR, Lyrics by VARCHAR, Performed by VARCHAR, First aired VARCHAR)  
SELECT Opponent in the final FROM runners-up_6 WHERE Partnering = graydon oliver